Added exceptional design challenges:

 

To discover more on a particular Challenge, checkout the hyperlink.

Chemical Product ChallengeYachts and Sailors ChallengeVehicle ChallengeEuropean Challenge
How to Make ChallengeFashion Goods ChallengeDesigners ChallengeManufacturing Machinery Challenge
Surmount Security ChallengeUltimate Cars ChallengeRewarding ChallengePublishers Challenge
Museums ChallengeAccomplished ChallengeGreatest Products ChallengeGreatest Art Pieces Challenge
Greatest Design Pieces ChallengeMasters' ChallengeDesignPrix ChallengeInspiring Challenge
Top Architecture ChallengeTop Designer ChallengeProfessional Artists ChallengeChampion Challenge
Meta ChallengePortfolio ChallengeHuman Resources ChallengeResearch Proposals Challenge
Truck ChallengeArt Works ChallengeBusiness Strategy ChallengeConventions Challenge
Blue Goods ChallengeColorful Goods ChallengeDictionary ChallengeParamount Challenge
Design Proposals ChallengeElectronic Goods ChallengeSocial Projects ChallengeArt Gallery Challenge
Additionally see: Catalog of Design Challenge | <- Index